Pitman-rod.



No. 68|,D27. Patented Aug. 20, 190i. L. T. LAKE.

PITMAN ROD.

(Application filed Jan. 29, 1901.)

(No Model.)

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UNITED STATES PATENT OFFICE.

LEVIS T. LAKE, OF ROYERTON, INDIANA.

PIT M A N R O D SPECIFICATION formingpart of Letters Patent No. 681,027, dated August 20, 1901.

Application filed January 29, 1901. Serial No- 45,195. (No model.)

To all whom it may concern.-

Be it known that I, LEWIS T. LAKE, a citi- I zen of the United States, residing at Royerton, in the county of Delaware and State of Indiana, have invented a new and useful Pitman-Rod, of which the following is a specifia pitman-rod which will be exceedinglylight and strong and at the same time be provided with means for taking up the wear, but mak ing strong connections with the other parts of the machine. These and other objects not I hereinbefore mentioned are accomplished by the construction illustrated in the accompanying drawings, wherein like letters of reference indicate corresponding parts in the several views, and in which- Figure 1 is a perspective view of my improved pitman-rod. Fig. 2 is a detail perspective view of one end of the pitman-rod, which is adapted to be connected to the pitman-wheel. I Fig. 3 is a section on the line 3 3, Fig. 1, showing the wrist-pin in elevation. Fig. 4 is a detail perspective view of a portion of the cutter-blade end of the pitman-rod, and Fig. 5 is a top plan view of the cutter-blade end of the pitman-rod and cutter-blade head, showing a portion of the cutter-blade.

In the drawings, A designates the central portion of the rod, which may be constructed of metal or wood or any other suitable material.

B designates the pitman-wheel, which is actuated by any suitable means. (Not shown.)

. Secured to the pitman-wheel end of the rod are two spring-arms O C.

These arms are secured to the rod proper by means of bolts The ends of these arms are enlarged and are provided with hollowed-out cup-shape portions D and transverse grooves.

E designates the Wrist-pin, which is secured to the pitman-wheel by means of a nut e.

This wrist-pin extends transversely between the arms 0 O and rests in the transverse grooves in the arms, as plainly shown in Figs. 1, 2, and 3. On the wrist-pin E is a spherical 'both arms.

enlargement E, which is adapted to fit within the hollowed-out portion D of the arms, as plainly shown in Figs. 2and 3. The pin eX- tends out beyond the spherical enlargement to make a more extended bearing for the arms. It will be noticed fromthis construction that the arms have a bearing on the spherical enlargement of the wrist-pin and also on the wrist-pin directly on opposite sides of the enlargement. Interposed between the arms and the pitman-wheel on the wrist-pin is an annular flange E, which is so positioned that it will bear against the side of the pitman-wheel and also against the inner side of the ends of the arms 0 0. It will thus be seen that by forming the arms with the hollowed-out cup-shape portions D and the transverse grooves on opposite sides thereof and adapting the wrist-pin to fit within the transverse grooves and by forming the wrist-pin with a centrally-arranged spherical enlargement fitting within the hollowedout portions and providing the annular flange on the wristpin interposed between the sides of the arm and pitmanwheel I provide a connection which will prevent all lateral movement of the pitman-rod on the wrist-pin and also provide a' hearing which will wear a long time and a bearing in which any wear can be easily taken up. 1'

To'take up any wear, either onthe arms or pin, I provide a bolt F, which passes through On one end of this bolt is a nut F. By simply screwing up this nut the arms can be brought closer together to take up the wear, as occasion requires. To look the nut in position, I provide the same with a ratchet F. Bearing against the ratchet is a spring F, which has one end secured to one of the arms by means of bolts f.

Secured to the sides of the cutter-blade end of the pitman are two spring arms G G. These arms are secured to the rod proper by means of bolts G. The outer ends of these arms are provided with a cut-away portion H.

K designates the cutter-blade head, which is adapted to be secured to the top of the cutter-blade L in any suitable manner, prefer ably by means of screws L passing through the apertures in the head. The rear end of the head is rounded and extends upwardly and then horizontally in the form of a gooseneck, as shown at K, and terminates in a ball K", which is adapted to fit Within the cut-away portions of the springarms H, as more plainly shown in Fig. 4. v

The object of providing the cutter blade .head with the rear gooseneck portion is to get this portion out of the way of the cutterblade arm or support when the cutter-blade reciprocates therein and at the same time not reduce the strength of the head, as hereinafter described.

By referring to Fig. 4 it will be seen that the upper portion of the cut-away portion H is open, so that the cutter-blade head can be raised up and assume an upright position, as is very often necessarily the case in mowingmachines. The lower part of the cut-away portion is provided with a shoulder h. These shoulders, one on each arm, will form a projection against which the lower side of the gooseneck will rest andprevent the cutterblade head and blade from sagging too far down. This I regard as quite an important feature of my invention, for the reason that by this construction the cutter head, while having a free movement in the end of the pitman rod, is limited in its downward movement,thereby taking considerable strain oft of the'lifting-lever and its connections when cutting over uneven ground.

To take up the wear, I secure the two arms G G together by means of a bolt I, havinga screw-threaded end, on which is placed a nut I". This nut is provided with a ratchet 1', against which normally bears the free end of the spring i-for locking the bolt to its adjusted position. The spring is sec ured to one of the arms by means of bolts 1'.

It will be noticed that the cutter-blade head, including the gooseneck portion, is in a line parallel with the cutter-blade and pitman-rod. By this construction when the parts are assembled the head and blade will be in a parallel line with the pitman-rod, so that there will be a straight pull from the rod to the head. As there is always a'considerable strain at this point and the parts are liable to break here, any construction which would decrease the strain I regard as especially advantageous. This straight pull is plainly shown in Fig. 5 and will greatly strengthen the joints between the rod and cutter-blade head.

I am aware that many minor changes can be made in the construction and arrangement of parts without in the least departing from the nature and principles of my invention.

Having thus described myinvention, what I claim as new, and desire to secure by Letters Patent, is

1. In a pitman-rod connection, the combination with a pitman-rod and pitman-wheel, of spring-arms extending from one end of the rod each arm provided with an enlarged head the head being provided with transverse grooves and a centrallyarranged hollowedout portion, a wrist-pin extending from the pitman-wheel adapted to pass between the enlarged portion of the arms and provided with a spherical enlargement adapted to fit in the hollowed portion of the arms the pin extending beyond the arms, a flange on the pin adapted to bear against the side of the enlargements on the arms and against the side of the pitman-wheel, and means for holding the arms together.

2. In a pitman-rod connection, the combination with a pitman-rod, of spring-arms extending from the sides of one end of the rod each arm provided with an enlarged end open at the top and a cut-out portion-in the enlargement, a cutter-blade head adapted to be secured to the top of the cutter-blade, the rear end of the head being curved upwardly and then horizontally terminating in a ball which is adapted to fit within the cut-out portion of the arms the cutter-blade head and rod being arranged in parallel lines, and means for holding the arms together.

3. In a pitman-rod connection, the combination with a pitman-rod, of spring-arms extending from the sides of one end of the rod each arm provided with an enlarged end and a cut -out portion in the enlargement, the two cut-out portions leaving an opening in the top, each cut-out portion formed with a shoulder on its lower portion, a cutter-blade head adapted to be secured to the top of the cutter-blade, an upwardly-curved portion on the cutter-blade head terminating in a horizontal portion, a ball on the end of the horizontal portion adapted to fit within the cutout portion, the upwardly-curved portion of the cutter-blade head adapted to bear against the shoulders on the arms when in its lowermost position, the cutter-blade head and pitman-rod being arranged in parallel lines and means for holding the arms together.

In testimony whereof I have hereunto set my hand in the presence of two witnesses.

' LEWIS T. LAKE.

Witnesses:

ELMER E. BOTKIN, WM. DU VAL BROWN. 

